Klassifikationsnummer
P - Language and Literature
23
E - United States History
20
H - Social Science
12
L - Education
10
D - World History
4
F - General American History
4
J - Political Science
3
K - Law
3
Q - Science
3
B - Philosophy, Psychology, Religion
2
M - Music
2
R - Medicine
2
C - Historical Sciences
1
S - Agriculture
1
U - Military Science
1